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Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
I've seen some winding devices with counters on Ebay. You can find it by searching under TRANSFORMER WINDING. Has anyone ever used one of these for winding transformers, motor coils or anything else?
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
We had such a thing at school once. Those hand operated machines, especially without brake and reduction, can sometimes befilmsy to use and it often requires two people to wind a nice winding or a TC secondary.
For larger coils, I found windscreen wiper motor to work almost perfectly; it is slow enough and worm bearing doesn't allow it to be spun from outside.
You can add some kind of turn counter if you need it, it can be anything from mechanical, calculator '=' or mcu/computer based.
For smaller coils I use a lego motor with reduction, also works nicely.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
I designed my friend's senior motor project for him, because he didn't have much of a clue. It was a cheapo orange drill from Harbor Freight. We took the speed control out and put in a half-wave SCR speed control, with magnetic braking, and reverse switch.
I used it last year as the drive for winding my recent Tesla coil secondary and it worked pretty well. I mounted the PVC through a threaded rod and some end caps, chucked up the drill, and activated it by my foot. That way my hands were free to guide the wire as the form spun. It cut the time down by a factor of 3, after it was all setup anyway.
Registered Member #153
Joined: Sun Feb 12 2006, 03:44PM
Location: Sweden
Posts: 31
I have tried a similar machine and as Firkrag says they can be a bit flimsy. I also used windscreen wiper motor and it worked perfectly, but my favorite is to use a CNC lathe to wind the coils. I constructed a spring loaded holder for the wire that i could fit on the turret of the lathe, wrote a simple program and then it was just to relax and see the machine do the job.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Wow.. lathe and cnc controlled head really ruin the 'fun' of coil winding
This is what I used for small coils. It could go with down to 0.05mm wire but it winds pretty slowly. Speed is just set by a linear regulator but it did it's job.
Registered Member #505
Joined: Sun Nov 19 2006, 06:42PM
Location: Yorkshire!
Posts: 329
We have a transformer winder at work - it's as old as the hills but it is great. There's a turn counter, a wire hopper, tensioner, turn counter, a selection of jigs for different cores, wire guage adjuster and foot pedal speed control.
You set the range over which the wire feed pulley can move to be the same width as the bobbin being wound and let fly with the foot pedal. I wound my Titch secondary on there after a bit of playing around with the wire diameter adjust (sets speed of movement of the wire feed pulley) and it gave great results.
I've also used it to wind a couple of CCFL inverter transformers from scratch too.
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transformer winding machines
